Sock Ons are a simple yet highly effective solution to the problem of keeping socks on. Sock Ons slip on over the sock and 'lock' it into place. The design lies in the fact that if the sock is pulled from the toes, the sock gets locked into the hole around the heel, thus preventing it from slipping off. Features 85% Nylon 15% Elastane Sock Ons are made from a softly woven blend of elasticised material with contrasting coloured stitching around the edges.